Crank-movement



(No Model.) 2 Sheets-Sheet 1. H GROVES CRANK MOVEMENT.

No. 440,561. Patented Nov. 11, 1890.

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(No Model.) a 2 Sheets-Sheet 2. H O GROVES CRANK MOVEMENT.

No. 440,561. Patented Nov. IL 1890.

V WIT/14559826 [/V V5 2 OZ? @XMar/ 2 a .zillarney UNITED STATES PATENT OFFICE.

HIRAM C. GROVES, OF NASHVILLE, KANSAS.

CRANK-MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 440,561, dated November 11, 1890.

Application filed March 27, 1890. Serial No. 345,516. (No model.)

To aZZ whom it may concern-.-

Be it known that I, HIRAM C. GROVES, a citizen of the United States, residing at Nashville, in the county of Kingman and State of Kansas, have invented certain new and useful Improvements in Crank-Movements; and I do hereby declare the following to be a full, clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention consists in a new and improved crank-movement, which will be hereinafter fully described and claimed.

Referring to the accompanying drawings, Figure 1 is a perspective front view of my device. Fig. 2 is a perspective View of the crank-shaft and guides with the outer casing removed. Fig. 3 is a sectional view taken on line 00 w of Fig. 1. Fig. 4 is a perspective rear View of the device. Fig. 5 is a perspective view of one of the journal-boxes, showingits periphery formed with an annular groove and with the plates J removed. Fig. (i is a perspective view of one of the j ournal-boxes formed with a rounded periphery and showing the plates J in position, and Fig. 7 is a detail view of one of the bushings hereinafter described.

The same letters of reference indicate corresponding parts in all the figures.

Referring to the several parts by letter, A indicates the supporting-frame, in which the crank-shaft l3 and the guides hereinafter described, are journaled. This supportingframe is preferably formed integral, as shown, with a base A and walls A The double crank shaft B is journaled in these side walls A The rear wall of the casing A is formed with two vertical slots A in which are pivotally secured the rear ends of guides or cross-heads D D, while the forward ends of these guides are free to follow the movements of the Wrists B of the crank-shaft. These guides or cross-heads are formed of two parallel side pieces D D, connected together at their ends by the end pieces D so as to leave a suitable space between them. The inner sides of the guides D are formed either with longitudinal guide-grooves D as shown in Figs. 1, 2, and 3, or with a longitudinal projecting guide-rib, according to the construction of the inner edges of the journal-boxes, which will be now described.

The journal-boxes consist each of a disk divided into two equal halves G G. The center of each disk is formed with an opening G, preferably octagonal in shape, and in this central opening fits a metal bushing formed of two half-cylinders H H. The outer circumference of this bushing is octagonal to coincide with the openings G in the disk G,

and the outer edges of the half-cylinders are flanged so that these flanges it will project over the sides or faces of the disks, as shown in the drawings, thus assisting in securing the bushings to the disks. The bushings H are first placed upon the wrists of the crankshaft, and the two halves of the disks are then placed in position and are firmly held together by the following devices: Each halfdisk is formed with transverse holes f, which extend entirely through it and with openings g, which reach into the said holes. The openings g in the half-disks register when the two halves of the disks are placed together, and threaded bolts F are placed in the said openings and nuts F are then screwed tightly on their ends, thus drawing and holding the halves of the disks firmly together. In order to securely lock the nuts upon the threaded bolts, flat metal plates J are secured to the sides of the disks so that they will cover the transverse openings and rest against the nuts, thereby locking the same on the bolts and preventing their turning, the plates being secured by suitable screws, and these plates will also assist in holding the halves of the disks together. The periphery of each disk is either suitably'rounded so as to fit in the longitudinal grooves D of the guides D, or is formed with an annular groove to receive the longitudinal guide-rib of the swinging guides. Each guide or cross-head D is formed on its upper side with an eye 01 or other suitable means for pivotally connecting it with the piston-rod of an engine.

From the foregoing description, taken in connection with the accompanying drawings, the construction, operation, and advantages of my new and improved crank-movement will be readily understood. As the pistonrods of an engine work back and forth they will, through the pitmen connecting them Ice with the guides D, rock the swinging crossheads, which turn on their pivoted rear ends, and as the cross-heads thus swing they will revolve the crank-shaft, the journal-boxes G G traveling back and forth in the guides D, as will be readily seen.

It will be seen that my invention is simple, strong, and durablein construction; that there will be a great reduction of the angular vibration or movement of the connecting-rods connecting the piston-rods with the crossheads D, owing to the peculiar construction and arrangement of the cross-heads pivotally mounted at one end in the casing A and in which the journal-boxes on the cranks of the shaft work; there will be no dead-centers, as with single-acting pistons, and, also, that by unscrewing the nuts F the journal-boxes and the metal bushings can be secured on the crank-shaft in operative position in a few moments and can be as readily removed as ,when it is desired to renew the bushings when worn through use.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is

1. In a crank-movement, the combination, with a supporting frame or casing, of the guides D, journaled therein at one of their ends and adapted to beconnected to the piston-rods of an engine, and a crank-shaft journaled transversely in said casing and having journal-boxes loosely mounted on its Wrists and working in the said swinging guides, substantially as set forth.

2. The combination of the casing A, formed with the vertical slots A the swinging guides pivoted at their rear ends in the said slots and adapted to be connected with the pistonrods of an engine, the shaft having the double crank and journaled transversely in the easing A, and journal-boxes loosely mounted on the cranks of the shaft and working in the said swinging guides, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

I-IIRAM C. GROVES.

Witnesses:

D. O. BREEOE, F. M. SAMs. 

